I've been using Inbound Brew (free plugin) for some time now and really enjoying what it has been doing for me. I practice inbound marking. I would call myself a sincere, significant, inbound marketer. The concept just sits right with me. Inbound Brew has been the best support I have found for that -- well, until I finally got around to trying the Pro (paid plugin) version.
Look, if you are just starting out, or if free is the preferable way to go, get this plugin and take it for a spin. It will do great things for you. Later, or if you want the extras now, get the Pro version. You will not regret it.
There's a learning curve with either choice but a little effort and a little time will be repaid in results many times over. This one is a keeper!